Product Description

The KMI Batt O Meter musician battery tester is a small device that allows musicians to test the remaining hours of battery life and voltage of 9 volt batteries while they are still inside gear with a 1/4-inch plug. The Batt-O-Meter works with almost any active instrument pickup or effects unit (stompboxes and other floor effects) that require a 9 volt battery to operate, and is turned on when a standard 1/4-inch cable is plugged into it. The Batt-O-Meter can test stand-alone batteries: 9V, 1.5V (AAA, AA), and 3V. It does this by automatically placing the battery under an appropriate load to simulate real world usage. It works with Alkaline, Rechargable, and old school Carbon-Zinc batteries.

Stomp boxes and instruments use a standard stereo 1/4-inch phone jack and devices sense the insertion of the 1/4-inch mono plug to turn on the power. Batt-O-Meter measures the Voltage and Current to let you know how many more hours the battery will work. A micro-processor within the unit allows the device to intelligently determine the different loads that can be put on the battery and calculate the power in hours remaining. This eliminates the need for extra buttons and adaptors, and makes the Batt-O-Meter simple to use.

What is the Power Probe?
The Power Probe is not your normal 1/4-inch plug. It is a gold plated 1/4-inch plug specially designed to allow the Batt-O-Meter to test the unit without turning it on. This allows for far more accurate readings with a wide array of devices.

Can the Batt-O-Meter check its own battery?
Yes! The Batt-O-Meter runs with on a 9 volt battery. Holding down the power button puts the device into self-test mode.

Why hasn't anyone done this or thought of this before?
It was almost impossible to create the Batt-O-Meter. The Batt-O-Meter required the equivalent of a high impedance instrumentation front end with an auto sensing - auto scaling computer controlled current and voltage measurement system. Doing this with $1000's of test gear is hard enough - doing it for the price of a few batteries was insane.

Check hard-to-reach batteries via the 1/4-inch input on most instruments and effects pedals.

- Fast, accurate, and easy to use, the Batt-O-Meter: saves you from risk and stress before a performance
- Saves you money by extending the life of each battery
- Saves you time by checking battery life before you take things apart
- Save the environment by reducing the number of discarded batteries

The convenient right angle 1/4-inch jack enables you to check a hard-to-reach battery still inside of equipment. Just plug the Batt-O-Meter battery tester into virtually any battery-operated device with a 1/4-inch jack input and find out if and when to change its battery.

Stop wasting time and money - don't guess when to change batteries - know with the Batt-O-Meter, the world's first battery tester for musicians.

(Requires 9 volt battery, not included)

zZounds is an authorized dealer of Keith McMillen Instruments products.

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KMI BattOMeter Customer Review

Feature:
works great as a battery tester, but don't expect it to work plugged into all pedals. It only works on about half of the input jacks I have. For the rest you have to take the battery out to test it, but still better than anything I had before.
Value:
Great buy
Overall:
Not quite the plug in tester I was hoping, but a great tool for giggers.

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"Doesn't work to test any of my 6 guitars"

Sound:
I bought this tester to test the batteries in my guitars. Tried it on my Breedlove with LR Baggs State Pro element, an Epi with a Fishman and 4 Taylors. All six guitars activate when you plug in 1/4" plug. It did not work on either one of them.
Feature:
I wish it would work on guitars like advertised.
Quality:
Seems to be built well but in my opinion it doesn't do what it's advertised to do.
Value:
It would be well worth the cost if it did what it's advertised to do but it's not worth it to me for what I paid.
Manufacturer Support:
I've emailed them asking about this problem and have yet to get a response.
Overall:
I already had a battery tester and only purchased this one thinking I could use it to test my batteries while still in my instrument by simply inserting the 1/4" plug. I really thought this would save me a lot of time testing batteries but I'm right where I was before I bought it, having to pull the batteries out of the instrument and testing it manually. If you're looking for something to just test your batteries this will work but if you're looking for something to save you time by checking your battery while it's still in your instrument this is not what you're looking for. Very disappointed and sorry I bought it.

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